I had two different tractors that broke the rear spirol pin and the driveshaft was still spinning , not sure how , but it wasn't spinning fast enough to build pressure to the pump.
I started to take the driveshaft out and when i took one of the rear spirol pins out it was broke in three pieces on one tractor and two pieces on the other. Replaced the pins and everything was good !!
Probably wouldn't hurt to check ALL of the pins first , including the front.
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